ClassSizein C++

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Hi,
Why does the Empty class size is 1 byte?
Can any one elaborate the answer.

thanks®ards
sarath

Posted 9-Dec-10 3:15am

sarathbabununna

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3 solutions

Solution 1

If it would be no byte at all then no object was created when instantiating it. You would otherwise get a null pointer and that would get you in much bigger trouble. So, the compiler just sizes it up to the smallest unit to give you at least something to reference when it is created. What would malloc(0), which is used internally to get the necessary space, do?

Good luck!

Posted 9-Dec-10 3:27am

E.F. Nijboer

Solution 3

Just to mark its existence. Here is the discussion -

http://www.geekinterview.com/question_details/42847[^]

Posted 9-Dec-10 3:31am

Prerak Patel

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CPallini · Accepted Answer · 2010-12-09T03:30:00

Solution 2

Ipse dixit: Bjarne Stroustrup's C++ Style and Technique FAQ - Why is the size of an empty class not zero?[^].
:)

Posted 9-Dec-10 3:30am

CPallini

Comments

Alain Rist 9-Dec-10 12:39pm

Verum :)